Ensure precise and powerful motor speed control for your application with PowerFlex 4M Triple-Phase Input Frequency Controllers by Allen Bradley. These affordable, compact inverter drives are ideal for standalone machine level control. PowerFlex 4M drives offer feed through wiring and ease-of-programming to provide you with a streamlined, flexible, and highly efficient motor control solution.

This drive is available in three frame sizes: A, B, and C, with power ratings from 0.2 to 11 kW (0.25 to 15 Hp) and in voltage classes of 120, 240 and 480 volts. Its ventilation system is only activated during motor operation, and it is silent when stopped, ensuring long service life.

• Power ratings from 0.37 to 11 kW in triple phase 400 V
• Pulse Width Modulation Frequency adjustable to 10 kHz for quiet operation
• DIN rail mounting feature on A and B frame drives
• Ambient temperatures up to 50 °C (122 °F) permitted with minimal spacing between drives
• Integral keypad included
• Ingress Protection level of IP20 with open type enclosure and slip compensation for enhanced stability
• Drive overload protection and ramp regulation
• Side-by-side Zero Stacking™ Drives for ambient temperatures up to 40 °C (104 °F)
• Integral RS-485 communications

An Inverter drive (also known as AC Drive, Variable Frequency Drive, or VFD) is a motor drive device which regulates the amount of power supplied to a motor, allowing for precise control of speed or torque to the motor to suit its application. They are situated between an electrical supply and a motor. Electrical motors run many things we use in our society today and inverter drives are used for speed control in a range of applications, such as simple fan and pump loads. Inverter drives are also used widely in industrial applications for high torque machine control. Most inverter drives now have features such as digital operation and LED displays allowing for easy set-up, monitoring, and adjustment of parameters by the user.

Inverter drives are controlled by inputting specific frequencies or parameters into the device. When power goes through the drive the inverter adjusts the frequency and voltage that is supplied to the motor. They ensure that an electrical motor receives only the necessary amount of power it requires to function, in order to reduce waste or loss of electrical energy, thereby making it more efficient to run. They can also gradually ramp up power for a slower, safer machine start up. Inside the inverter, incoming AC power is converted to DC power via a rectifier made up of diodes, which is then smoothed to a clean, constant voltage by capacitors, and is then fed back out as AC power via output transistors.

This compact AC drive from Rockwell Automation's Allen Bradley range is used to control the speed of industrial machinery. Its user-friendly system makes it easy to programme while providing accurate and reliable motor control for improved workplace safety. The three-phase inverter is extremely quiet, which enhances the overall efficiency of your system. An intuitive 4-digit display with 10 additional LED (light-emitting diode) indicators lets you view drive status for ease of use. This device is ideal for standalone machine-level control.

• User-friendly integral RS-485 communications for programming from a PC (personal computer)
• IP20 (ingress protection) rated unit that's protected from dirt particles larger than 12mm
• Easy to snap onto a DIN rail for quick installation
• Includes an integral filter for high levels of electromagnetic compatibility to prevent electrical interference with nearby equipment

• EN (European Norm)
• UL (Underwriters' Laboratories)

This space-saving device is zero stacking, which means you can use it at ambient temperatures of up to +50°C with only minimal spacing between it and other drives. If packed side-by-side with other components, its maximum operating temperature is +40°C.